---
name: "happrox"
section: "1"
platform: "linux"
package: "gts"
version: "0.7.6.121130-5"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/happrox"
---

# happrox(1)

returns a simplified triangulation of a set of points using algorithm III of Garland and Heckbert (1995).

## NAME

happrox - returns a simplified triangulation of a set of points using algorithm III of Garland and Heckbert (1995).

## SYNOPSIS

**happrox** \[*OPTIONS*\] \< \[*input.pgm*\|*input*\] \> *output.gts*

## DESCRIPTION

This manual page documents briefly the  **happrox** command.

## OPTIONS

This program follow the usual GNU command line syntax, with long options starting with two dashes (\`-'). A summary of options is included below.

- **-n** *N,* **--number=***N*

  Stop the refinement process if the number of vertices is larger than *N*.

- **-c** *C,* **--cost=***C*

  Stop the refinement process if the cost of insertion of a vertex is smaller than *C*.

- **-f**, **--flat**

  Input is a flat file with three x,y,z columns (default is PGM file).

- **-r** *Z,* **--relative=***Z*

  Use relative height cost for all heights larger than *Z*.

- **-k**, **--keep**

  Keep enclosing triangle.

- **-C**, **--closed**

  Close the surface.

- **-l**, **--log**

  Log evolution of cost.

- **-v**, **--verbose**

  Display surface statistics.

- **-h**, **--help**

  Display the help and exit.

## AUTHOR

happrox was written by Stephane Popinet \<popinet@users.sourceforge.net\>.

This manual page was written by Ruben Molina \<rmolina@udea.edu.co\>, for the Debian project (but may be used by others).